- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | ZHANG Ming, XIE Yansong, LI Hongtao, SUN Feng, XU Fangchao, ZHANG Lei. Modeling and Characteristic Analysis of a Magnetic Spring with High Static Stiffness and Low Dynamic Stiffness[J]. Journal of Southwest Jiaotong University, 2023, 58(4): 933-939, 946. doi: 10.3969/j.issn.0258-2724.20220821
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A novel magnetic spring element with high static stiffness and low dynamic stiffness was designed to address the conflict between low natural frequency and high bearing capacity in the field of low-frequency vibration isolation. First, the spring force and stiffness models of the magnetic spring were built based on electromagnetic field theory and molecular current method; secondly, the dynamics model of the system was established, and the influence of coils with different currents on displacement transmissibility was analyzed and compared with the equivalent linear spring; finally, an experimental prototype was developed, and an experimental study was carried out. The simulation and experimental results show that the air-gap stiffness curve of the magnetic spring presents a nonlinear relationship of being initially flat and then sharp, which indicates obvious characteristics of high static stiffness and low dynamic stiffness. The stiffness is approximately linear with the current. The magnetic spring can achieve a wide range of stiffness adjustment by changing the current, and the stiffness response is rapid; when no current is applied, the starting vibration isolation frequency and peak transmissibility are decreased by 26% compared with the equivalent linear spring. When a negative rated current is applied, the starting vibration isolation frequency and peak transmissibility are reduced by 41%.
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Figures(14) / Tables(1)
ZHANG Ming, XIE Yansong, LI Hongtao, SUN Feng, XU Fangchao, ZHANG Lei. Modeling and Characteristic Analysis of a Magnetic Spring with High Static Stiffness and Low Dynamic Stiffness[J]. Journal of Southwest Jiaotong University, 2023, 58(4): 933-939, 946. doi: 10.3969/j.issn.0258-2724.20220821
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